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July 2009This report is the first time a national picture of water quality in dairying catchments has been published for New Zealand. The report draws together water quality and land-use information from 14 river catchments. Read more -
June 2016This report presents the findings of a review of continuous dissolved oxygen data in New Zealand including an assessment of observed dissolved oxygen concentrations in relation to the National Objectives Framework (point source) band thresholds. Read more -
July 2008This proposed National Policy Statement on Freshwater Management sets out the objective and policies for managing New Zealand's freshwater resources under the Resource Management Act 1991. The NPS came into effect on 1 July 2011. Read more -
May 2020This report presents the modelled results of the impact of the National Policy Statement for Freshwater Management (2017) and two variants of the Essential Freshwater package on New Zealand’s economy in 2030 and 2050. Read more -
May 2010This report is one of two prepared for the Ministry for the Environment by NIWA, which update national indicator data for river water quality in New Zealand and help provide the evidence base for policy and decision makers. Read more -
September 2005During 2005/06 the Organisation for Economic Cooperation and Development (OECD) undertook a review of New Zealand’s environmental performance. This information sheet outlined the nature and process of the review and how interested individuals and groups could get involved. Read more -
February 2004This guideline provides best practice for the sampling and analysis of soils on sites where hazardous substances are present or suspected in soils in New Zealand, and guidance on the principles governing the interpretation of the data obtained. Read more -
September 2009This report provides an update of results for indicators of groundwater quality in New Zealand. It summarises average water quality at almost 1000 monitoring sites over the period 1995-2008, as well as trends at the same sites within that period of time. Read more -
May 2018Phormidium is a potentially toxic, mat-forming benthic cyanobacterium found in an increasing number of New Zealand rivers. This report outlines a study which assessed Phormidium toxin levels in the Cardrona (Otago), Mataura (Southland) and Hutt (Wellington) Rivers in 2017. Read more -
December 2009The Water Research Strategy sets out the issues for water management and guides investment in water research. It is intended to guide the science sector to deliver the information and tools required to enable world class management of water resources in New Zealand. Read more -
December 2018Ministry for the Environment, in partnership with Bay of Plenty Regional Council, commissioned Perrin Ag Consultants Ltd and Manaaki Whenua Landcare Research to assess the farm/orchard-gate economic impact of applying a range of mitigation practices to reduce losses of nitrogen, phosphorus, E. coli and sediment. Read more -
February 2017This report has been produced to test potential consequences of setting freshwater objectives for hydro scheme operations. Modelling was undertaken of a selection of various scenarios involving an increase in minimum flows in selected rivers to assess the impact of draft proposals to amend the NPS Freshwater Management on the New Zealand electricity system. Read more -
July 2017Since 2015, Gisborne District Council (GDC) and Beef and Lamb New Zealand have been engaging with Rere farmers to try and raise water quality together to a swimmable standard. Farmer interest and participation in the project has been high and this report tells the story of the Rere Project to date, including lessons, next steps and strategic implications. Read more -
October 2017This report details the methodologies underlying updated estimates of glacier ice volume change in New Zealand. The estimates were used in the measure of Annual glacier ice volumes in the Environmental indicators Te taiao Aotearoa series. Read more -
September 2019This is the draft of the proposed new National Policy Statement for Freshwater Management (NPS-FM). It sets out the objectives and policies for freshwater management under the Resource Management Act 1991. Read more -
September 2015Citizen science is emerging as a new source of data that could potentially be used in environmental monitoring and reporting. This project looked at the Garden Bird Survey as an example of a citizen science dataset. Read more -
May 2020This report summarises work to evaluate load reductions required to meet the new National Policy Statement for Freshwater Management's nutrient-related bottom lines. Read more -
April 2010This report informs the ‘environmental flows and water measuring’ and ‘water quality limits’ projects commissioned as part of the New Start for Fresh Water programme in 2009. Read more -
On tap?: Attitudes, behaviours, and perceptions of household water use – informing demand managementJuly 2009This report summarises research on household water use. It presents existing and new consumer research on attitudes to water, population segmentations, behaviours, and barriers and incentives to action. Read more -
September 2019This report by Kāhui Wai Māori sets out recommendations for our nation to journey together in implementing a managed transitoin to a new system of care and respect for water. Read more -
September 2019As part of the Essential Freshwater programme, the Government is considering changes to nitrogen and phosphorus regulations. This study aimed to determine the impact of the proposed new nitrogen regulation. Read more -
December 2000The Stream Periphyton Monitoring Manual describes a standard set of methods for regional councils, consultants and researchers to collect and analyse data on periphyton for resource surveys, impact assessments/monitoring, state of environment reporting and research studies. Read more -
November 2010This report presents a summary of the regional council consent data for water takes between 2009–10. The information in the report has been used to update the freshwater demand environmental indicator. Read more -
October 2011A history of the Fruitgrowers’ Chemical Company (FCC) at Mapua and the clean up of the site. Read more -
May 2014The technical report commissioned to provide us with some of the data used in the 2014 Air domain report. Read more -
November 2017This material is incorporated by reference in the National Policy Statement for Freshwater Management 2020. Read more -
January 2010This report documents the tools being used to support Māori participation in freshwater management under the Resource Management Act 1991 and suggests areas that could be further investigated. Read more -
May 2019This report outlines the different potential approaches for characterising the pressure created by dams on the flow regime of rivers and streams. Read more -
April 2017This report outlines the development of a pressure-state-impact model to predict the effect of water abstractions on river flows, using Canterbury as a case study. Read more -
September 2019This report builds upon the findings of the Sediment attributes and urban development (report 1) literature review - see link in Related publications below. Read more -
May 2019This report updates previously published statistics on water consented to be taken from surface and groundwater sources for consumptive uses (such as irrigation or drinking water). Read more -
August 2020The Wetland Delineation Protocols give a robust method for delineating wetlands based on the United States delineation system. Read more -
May 2017This report provides information on the categories used in the swimming maps, proposed targets, and proposed amendments to the National Policy Statement for Freshwater Management released as part of the Government’s Clean Water package in February 2017. Read more -
March 2016This report priorities suggested improvements to enhance and expand air domain reporting. Read more -
May 2007This material is incorporated by reference in the National Policy Statement for Freshwater Management 2020. Read more -
May 2011An evaluation of alternatives, benefits and costs under section 32 of the Resource Management Act 1991 was carried out before the introduction of the National Policy Statement for Freshwater Management 2011. The NES came into effect on 1 July 2011. Read more -
April 2020This report by Cawthron collates and analyses regional council river and stream monitoring data, including measures of fine deposited sediment and habitat quality. Read more -
November 1998This document provides standardised whole effluent toxicity testing (WETT) protocols to test the potential biological impact of discharges into the aquatic environment of contaminated wastewater. Read more -
April 2012This users’ guide explains the regulations and provides guidance to territorial and unitary authorities on implementing the National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Human Health. Read more -
July 2004This paper was published as part of the Water Programme of Action Freshwater for a Sustainable Future consultation. Read more -
May 2011The National Policy Statement for Freshwater Management 2011 sets out the objectives and policies for freshwater management under the Resource Management Act 1991. The NES came into effect on 1 July 2011. Read more -
November 2006This guideline was developed to help local authorities address the potential risks from contaminated sheep-dip sites. It provides best practice advice on identifying potentially contaminated sheep-dip sites, and determining the acceptable level of contamination for various land uses. Read more -
June 2009This report presents the results of an audit of the remediation of the former Fruitgrowers Chemical Company site at Mapua. Read more -
August 2018Trend analyses performed on many sites are regularly aggregated by water quality variable and summarised in tabular, graphical or map format as part of environmental reporting. Read more -
January 2021This report describes a pilot study to validate methods and assess cost savings for the design of a large-scale replacement study of the 1998-2000 Quantitative Microbial Risk Assessment. Read more -
May 2019This report characterises the pressure on surface water flows from actual water takes for the Horizons (Manawatu-Wanganui) and Greater Wellington regions in the lower half of the North Island. Read more -
June 2017The regional/unitary councils for Waikato, Auckland, and Northland require a model to predict the annual delivery and sources of sediment across their regions for the purposes of environmental reporting and to inform strategy, policy, and sediment management operations. This study addresses this requirement in two tasks. Read more -
May 2019This report examines whether measures of the macroinvertebrate community can provide information on the health of the trout populations that feed on them, based on existing data. Read more -
September 2016This draft revised guideline has been released to assist understanding of the proposed amendments to the National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Human Health. The final revised guideline will be gazetted in early 2017. Read more
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